Bacteriological testing for streptococcus infections of the throat,showing 2 culture petri dishes (each containing 2 bacitracin discs). The dish on right shows a positive result; growth of Streptococcus sp. has been inhibited around the bacitracin discs (bacitracin is an antibiotic produced by certain strains of bacteria which is effective against certain strains of microorganisms),but the discolouration of the blood agar indicates beta-haemolysis,the ability of strains of Streptococcus pyogenes to destroy red blood cells in blood agar. N.B. This technique provides a means of classifying the many different strains of the bacteria | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Bucher, Van D. |
Bildgröße: | 3788 px × 2458 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
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